VEVOR Dual Battery Isolator Kit 12V 140Amp
Best price now
$63.90at Best BuyChecked Nov 10
Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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This is a dual battery isolator kit built around a 12V, 140A voltage-sensitive relay, with a 20 ft red cable, a 2 ft ground cable and a small voltage display. The relay connects the second battery only when the main battery is charging, so accessories run off the auxiliary battery without draining the one that starts the engine. The adjustable 3-60 second delay and 4.5-20V display are features budget isolators often skip. It suits DIY camper, boat and off-road builds that want a simple automatic setup rather than a manual switch or a DC-DC charger.
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Lowest price we've seen: $63.90 on Nov 10 at Best Buy. Tracked across 1 store since Nov 10.
Owners of budget dual-battery kits like this generally report the relay does its basic job: it links the batteries when charging and separates them when the engine is off. Common complaints center on the plastic housing, the generic relay internals and the lack of proper fusing and cable gauge for heavier loads.
